How to calculate caco3 equivalent , Chemistry

Q. Ca+2 = 20 ppm, Mg+2 = 25 ppm, CO2 = 30 ppm, HCO-3 = 150, K+ = 10 ppm. Calculate the lime (87% pure) and soda (91% pure) required softening 1 million litters of water sample.

Ans.

Calculation of CaCO3 equivalent of given impurities:

S.NO

substances

Amount of substances in mg/L

Multiplication factor

CaCO3 equivalent mg/L

1.

Ca++

20 ppm

100/40

100/40*20 =50

2.

Mg++

25 ppm

100/24

100/24*25 = 104.16

3.

CO2

30 ppm

100/44

100/44*30  = 68.181

4.

HCO-3

150 ppm

100/122

100/122*150 = 122.95

5.

K+

10 ppm

Not produce hardness

 

Lime required:

74/100[Mg++ + CO2 + HCO-3 as CaCO3 equivalent] mg/L *Volume of water*100/%purity

74/100[104.16 + 68.181 + 122.95] mg/L*1000000l*100/86

74/100[295.29] mg/L * 100000*100/87

= 251.16*106 mg

= 251.16*106 mg*1Kg/106

= 251.16

Soda required = 106/100[50 + 104.16 – 122.95] mg/L *1000000*100/91

   = 100/106[31.21] mg/L*106*100/91

   = 36.35*106 mg

   = 36.35*106 mg*1Kg/106

    = 36.35Kg

Posted Date: 7/21/2012 9:19:56 AM | Location : United States







Related Discussions:- How to calculate caco3 equivalent , Assignment Help, Ask Question on How to calculate caco3 equivalent , Get Answer, Expert's Help, How to calculate caco3 equivalent Discussions

Write discussion on How to calculate caco3 equivalent
Your posts are moderated
Related Questions
Composition of protein - Biomolecules Composition of a protein changes with source. An estimated composition is as follows: Carbon from 50-53%; hydrogen from 6-7%; oxygen fr

explain how adsorption as a method of water treatment

Nitrogen Containing Compounds The important nitrogen consisting of organic compounds that are alkyl nitrites (RONO), nitro-alkanes (RNO 2 ), amines (- NH 2 ), aromatic nitro co


The boron trihalides are highly volatile; BF 3 (b. p., 173 K) and BCI 3 , (b. p., 260.5 K are gases, BBr 3 a volatile liquid (b. p., 319 K) and Bl 3 a low melting solid (m. p.,

difference between lanthanoids and actanoids

Explain the Gibbs Phase Rule for Multicomponent Systems? The Gibbs phase rule for a pure substance was written F = 3 - P. We now consider a system of more than one substance an



Show by means of equations and reagents, how the following conversion would be achieved? Propyne to butanoic acid